Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb7a91a73aeab6d8ec9304da92a74babd006bdc2a55f6c2a3c7a0d3ac0c19221' 
  AND token = 'IbNBHvIOi4Af+RLDi+l/kxRicgOuzDm7tGc4BbA4zZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}